package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.sky.constant.MessageConstant;
import com.sky.dto.UserLoginDTO;
import com.sky.entity.User;
import com.sky.exception.LoginFailedException;
import com.sky.mapper.UserMapper;
import com.sky.properties.WeChatProperties;
import com.sky.service.UserService;
import com.sky.utils.HttpClientUtil;
import org.apache.http.impl.client.HttpClients;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.HashMap;
import java.util.Map;

@Service
public class UserServiceImpl implements UserService {
    //微信服务接口地址
    public static final String WX_LOGIN="https://api.weixin.qq.com/sns/jscode2session";

    @Autowired
    private WeChatProperties weChatProperties;

    @Autowired
    private UserMapper userMapper;

    @Override
    public User login(UserLoginDTO userLoginDTO) {
        //调用微信接口服务，获取微信用户信息
        Map<String, String> map=new HashMap<>();
        map.put("appid",weChatProperties.getAppid());
        map.put("secret",weChatProperties.getSecret());
        map.put("js_code",userLoginDTO.getCode());
        map.put("grant_type","authorization_code");
        String json= HttpClientUtil.doGet(WX_LOGIN, map);
        JSONObject jsonObject = JSON.parseObject(json);
        String openid = jsonObject.getString("openid");
        //判断openid是否为空，为空则登录失败，抛出业务异常
        if(openid==null)
        {
            throw new LoginFailedException(MessageConstant.LOGIN_FAILED);
        }

        //判断是否为新用户（根据openid查数据库）,新用户自动注册
        User user = userMapper.getByopenId(openid);
        if(user==null)
        {
            user = User.builder()
                    .openid(openid)
                    .createTime(LocalDateTime.now())
                    .build();
            userMapper.insert(user);
        }
        return user;
    }
}
